Punching jig



L. GOEHR. PUNCHING HG APPLICATION man AUG. 10. 1920.

Patented June 20, 1922.

INVENTOR.

7 v iauzb'qoen f 11% BY I M1 @TTOR L nNrra-o LOUIS GOEHB, OF SAN FRANCISCO, CALIFORNIA.

Specification of Letters Patent.

- rammed June 2c, 1922.

Application filed August 1o, 1920. Serial No. 402,669.

GoEHR, citizen machine having a reciprocatorvmovement and capable of receiving the jig thereby making it possible to carry out a series of punching operations of a. given kindin machines not specially adapted for'punching purposes.

It will be understood by those skilled in the art that the ordinary punching machine is provided with punching apparatus and dies which are built into the machine or attached thereto in a manner such as to make the machine practical and especially machines for that single apparatus.

In the present invention the jig is produced and carries a series of punches which may accomplish a number of different objects or a series of punches may be used on the jig and the jig itself is a complete piece of apparatus which'is merely set into any machine having a suitable reciprocatin movement and strong enough to accomplis the desired object.

.in the accompanying drawings -.in which It is intended that any number of the foregoing jigs may be kept on hand for different punching operations and may be attached to or removed from the pressing apparatus at will whenever a different series of punching operations is to be carried out.

Another object of the invention is to provide means whereby the punching operations may be carried out in two movements of the press if the number of punches usedand the material being punched is too heavy for the given press to operate all of the punches at one time.

Another object of the invention is to provide the punches with stripping apparatus so as to make it convenient to apply oil to the punchin order to make the material punched strip easily in the punch.

Other objects of the invention will appear as the description proceeds.

An embodiment of the invention is shown the same reference numeral is applied to the same portion throughout, but I am aware that there may be modifications thereof.

Figure 1 is a front elevation of a portion of a pressing machine in which one of these jigs has been assembled.

Fig. 2 is a front elevation of one of the jigs a portion thereof being broken awayfor purposes of illustration.

F Fig. 3 is a plan view of the jig shown in 1g.

Fig.4 is a vertical sectional view of the jig shown in Fig. 2 on the line 4-4.

Fig. 5 is a vertical section on the line 5-5 of Fig. 2. I v

Fig. 6 is a plan view of the movable anvil used on the press for enabling one-half of the punches to beoperated on each movement of the press.

Fig. 7 is a front elevation of one of the punch carrying tubes.

The numeral 1' indicates the base of the press, said base having side frames 2 and 3 which carry bearings 4 and 5 for the main shaft 6.

In the present instance the press is driven from the motor 7 which has a small gear 8 in mesh with a lar er gear 9 on the shaft 10 on the back of the rames 2 and 3. The shaft 10 also carries two small gears 11 and 12 in mesh with large gears 13 and 14 on the main shaftfi, so that the shaft 6 rotates slowly but with very great power. The shaft 6 carries two eccentrics 16 and 17, which' eccen'trics cause two links 18 and 19 to rise and fall as the shaft 6 rotates.

Atthe lower end of the links 18 and 19 there is the anvil head 20, this head carries a slidable anvil block 21 which has a number of holes therein placed to correspond with the osition of one-half the punches used. This anvil block is held in place by means of slotted lugs 23 and 24 and it is moved manually with the handle 25.

The j-ig base is indicated at 26 and it has two or more lugs 27 for securing it to the base of the pressing machine. The jig base is provided with a plurality of openings to receive dies 28 of any desired shape of opening which are held in place by means of a plurality of set-screws 29; one for each die. lt each end of the base 26 there are pins as shown at 30 and 31 said pins belng forced into'tape'red holes in the base and forming guides for the tubes 32 and earned by the ends of the punch supporting bar 34.

I 26 so that the lower ends of the'strippers 37 Springs and 36 surrounding the pins 30 and 31 hold the bar 34 raised from 'the base are out of contact with the base.

' The strippers 37 are threaded as indicated at 38 and are each secured in the bar 34 by means of theloclr nut 39. Surrounding each stripper is a heavy-spiral spring 40 which bears upon the lock nut 39 and bears upon the under side of the fiat head 4:1 of the punch 42. In order to hold the punch 42 in a fixed position with respect to the stripper it is provided witha pin t3 which moves in a slot 44 of the stripper 37. l

In order to provide for the convenient oilin of the ends of the punches the stripper tu e is cut away as indicated at 45.

In operation the plate of metal is slipped under the punches, the press is then operated to give one complete rotation of the shaft- 6 whereupon one-half of. the punches in the jig shown will be operated to produce holes in the plate to be punched.

As soon as the shaft 6 has been rotated once the anvil 31 may be moved tothe right note Fig. 1) to the end of its throw whereupon theremainingonahalf of the punches will be operated on the next rotation of the shaft 6.

It will be understoodby those skilled in theart that while the movable anvil 21'has been shown .with holes therein to operate one-half the punches at a time that all may be provided with a ditlerent series of holes to operate a less number of punches if that is desired.

What I claim is as follows, but various modifications may be made in the construction shown in the drawings and above particularly described form within the purview of my invention:

1. A punching comprising a base carrying a plurality of dies, a bar above the base, guides for directing the movement of the bar, springs-for sl lpporting the 'bar resiliently in a given position, a plurality of punch guides, stripper tubes carried by the bar, punches movable in'the latter guides and stripper tubes and springs for supporting said punches so that the ends of the punches will be normally above the bottom plurality of guides and stripper tubes c arried by the bar, lock nuts on the last named guides for holding them in a fixed adju'st rnent with respect to the bar, punches in said guides and stripper tubes to correspond with the dies and springs for holding the punches with their ends normally above the bottom of Lows Gonna 

